We've recently started getting a problem when trying to insert images (or other media) into a forum discussion reply.
It works fine for the starting post in a thread, but when any replies are added, any images added using the "insert -> Image/video/file" menu in the RTE disappear when the reply is posted. The image appears in the upload dialog box, and also appears in the reply RTE, but as soon as the reply is posted, the image disappears. Any other content in the reply, such as text, works correctly.
There are no errors reported in the back office, and there are no errors appearing in Dev Tools in the browser.
Has anyone else ever experienced this?
Thanks
Steve